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J. D. SlNGLETON.

JACK; APPLICATION FILED firm-23,1918.-

v Patented July 22,1919;

, JAMES :0. SINGLETON, or'aousmoamxas.

JACK.

To all whom it may come-m; Be it known that 1, JAMES D. SINGLETON, a citizen of the United States, resid ng at Houston, in the county of Harris and State of Texas, have invented certain new and useful Improvements"in Jacks, of which the following is a specification.

This invention relates to new and useful improvements in jack, and hasparticular relation to a device of the character described specially designedfor use. in "ship carpentry.

The object of the invention is to provide a device of the character described, designed to be used in fastening the siding to the ribs of a ship hull, and particularly for forcing the boards of which the siding is formed closely together before they are secured to the ribs, forming the framework. In securing these boards to the ribs, it is essential that they be forced closely together so as to form tight joints, and this can not be done manually, so this jack has been provided to accomplish the work mechanically, thereby providing means whereby suflicient force may be applied to quickly and easily force the board to be nailed closely against the one already secured to the ribs, thus forming close fitting joints.

Another object of the invention is to provide a device of the character described, which may be adapted for various, similar uses, such as bending iron beams, and in various kinds of wooden and steel constructions.

Another object of the invention is to pro: vide a device of the character described, which is light, simple in construction and one which may be easily handled and kept in repair.

With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein: I

Figure 1, is a perspective view of the device, and

Fig. 2, a transverse, sectional view, taken on the line 22 of Fig. 1.

Referring now more particulary to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1, refers to a siding board which has been secured to the frai'nework of a Specification of Letters Patent.

Patented July 22, 1919.

Application filed-September 23 1918. Serial No; 255,218.

vessel, said framework including ribs as 2, forming a fixed support and the numeral 3, designates a board placed in position to be permanently secured in place.

. The jack includes a block 4:, having the side wings 5, 5. The side of the block adj acent the ribs 2, has tangs 6, which engage with the rib, when the jack is in use, to assist in holding the jack fixed in position relative to the rib.

. Hinged to the wings 5, 5, are the" engagzingfmembers 7, 7, one pair 011 each side one end of each member being formed into a hook which engages with, and may be detached from, the corresponding wings, and the other end thereof being formed into an engaging tooth and these teeth are provided to engage with the sides of the ribs, as shown in Fig. 2, to anchor the jack thereto. Threaded lengthwise through the block 4 is a shaft 8, one end of which has a handle 9, by means of which it may be turned, and the other end of which has a head block 10, connected thereto by means of a swivel ball and socket joint 11. The outer end of this head block has tangs 12, 12, which are provided to engage with the board being placed to prevent the head blockfrom slippage relative thereto.

In operation, the jack is secured to one of the ribs, 2, as explained, and the board 3 is then placed in position and by the manipulation of the handle 9, the shaft is turned and the board 3, thereby forced closely against the board 1, and then nailed to the rib. The jack may be then readily moved from rib to rib throughout the entire length of the board until it is nailed in position to the ribs from end to end.

What I claim is:

1. A jack including a block having engaging tangs and provided with laterally extending wings, engaging members hinged to the wings and provided to engage with and secure the block to, a stationary support, said tangs engaging with said support, a drive shaft threaded through the block, means for rotating the shaft, a head block having a swiveling connection with one end of the shaft and being provided with tangs which engage with the object to be moved by said jack.

2. A jack comprising an oblong block, laterally extending wings carried by the upper side thereof, engaging hooks hinged to the wings and detachable therefrom, and

adapted to secure the block to a stationary support, tangs, integral with said block, adapted to engage with said support to secure the block against slippage, relative to said support, a shaft threaded through the block, a handle provided at one end of the shaft to rotate the same, a headblock having a swiveling connection with the other end of the shaft and provided to operate against the object to be moved'by said jack, and tangs integral with the operative face of said block and provided to engage with said object.

3. A jack including an oblong block, having a flat face which rests against a stationary support, tangs on said fiat face, laterally extending wings formed integral with the block, engaging members, one end of each of said members being formed into a hook,

which has a detachable engagement with the corresponding wing, and the other end of said member being formed with an engaging tooth which engages with said support, said members securing said block to said support, a shaft threaded through said block, means for rotating said shaft, and a head block having a swiveling connection with one end of the shaft and operating against the object to be moved by said jack.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES D. SINGLETON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

